Different types of fixtures

For this section, I have researched the different types of lanterns. I believe that this will help me understand the lanterns themselves, and will help me know what to use within my design. Although there is a lot of brands for these different lanterns, I am going to just talk about their features as a whole.

Profiles:

(Profile lighting, no date)

 

Image result for profile lightA Profile, also known as an ERS, is one of the most convenient types of lanterns. It offers copious visual variants and is aesthetically versatile. There are two different types of profiles. Ellipsoidal and Condenser Optics. The first one I am going to talk about is an  ellipsoidal reflector, which makes it easier to focus the lantern. The lights circle breadth is adjusted by an iris diaphragm which is placed at the front focal point. Near the iris, there is a gobo slot, as well as four shutters. These shutters are used to restrict the light beam vertically and horizontally. There are three different planes within a profile which will modify the beam and are placed closely behind each other. The shutters are placed either on four or two different planes. The gobo slot, which I previously mentioned, is placed on an additional plane. This is so the beam can be transformed to produce any desired shape. This style of lantern has become more effective over the years with the use of zoom optics. This is like a zoom lens you would find on a digital camera. It will produce a much better quality, however this can be disputed through the workings of the individual operating/designing of the lighting. (Meet Google drive – One place for all your files, no date) (Shelley, 2011)

In comparison to the ellipsoidal, a condenser optics light discharged by the lamp and the spherical reflector is focused by the lens of the lantern. The same as the ellipsoidal, the beam is changed by hand by the use of an iris diaphragm, shutters and/or a gobo. Transposable lenses may also alter the focal length on this lantern. These styles of profiles are improved and are more convenient for altering the focal length. With condenser optics lanterns, the lenses are no longer changed, but in addition, an adjustable lens is fitted that will allow the lantern to cover a greater range of beam angles. An example of the beam angles are:

  • 12 – 22
  • 16 – 30
  • 28 – 40

Fresnel:

Image result for fresnel light

(A Philips group brand arena PC & Fresnel | strand lighting – A Philips group brand, no date)

The way the Fresnel was built is similar to that of a traditional profile, however the lens is replaced by a Fresnel lens, which consists of ridges to make the edge of the beam diffused. The basis of this lens is so that large diameters can be used. The way in which you change the size of the beam works the same way as a Profile. The light is diffused leaving colour errors less noticeable around the edges. This is because the beam that is being produced is soft edged from the ridges of the lens. Fresnels are generally used as a general coverage of the stage, as you can use barn doors to section off the stage evenly. This style of lantern can take incandescent and discharge lamps.

Parcans:

Image result for parcan

(111, no date)

A Parcan is a lantern that has been further developed from the parabolic reflector. The way in which the lantern makes light is used by an incandescent coil, (which is an arc in the case of the discharge lamp), a reflector; holder and front lens is placed within in confined unit and is mounted within the housing.

The beam that is produced is oval, and they are essentially sharply defined. The focal length cannot be altered, however, it can be determined from the lamp chosen. This style of lantern can be purchased in four different beam angles consisting of:

  • Narrow Beam (9×12)
  • Medium Beam (10×15)
  • Wide Beam (11×24)
  • 70×70

These different beam angles are created by the uppermost layer of the lens.

Floods:

Image result for floodlight

(The strand archive – Iris Flood, no date)

A Flood is personally the simplest form of lighting, which consists of a lamp; reflector in a box with no lens. The reflectors job in this case is to concentrate the beam out of the box. There is no controlling the focus of this lantern other than guiding the beam in the direction you would like it. Some Floods nowadays have an asymmetric or diagonal reflector which are designed to light cyclaramas. These types of Floods have a linear lamp, which will help light the entire stage. (Types of lantern, no date)

P.C (Pebble Convex)

Image result for pebble convex

(Pebble convex, no date)

This style of lantern has many different similarities to the Profile and Fresnel. The lens that this lantern uses is a modified plano-convex lens with pebbled effects on the plano side. This pebbled effect gives the beam its characteristic soft edge. This beam is moderately harder than a Fresnel is, but it is not hard edged.

Bibliography:

Profile lighting (no date) Available at: https://www.google.co.uk/search?q=profile+lighting&es_sm=93&biw=1280&bih=667&source=lnms&tbm=isch&sa=X&sqi=2&ved=0CAcQ_AUoAmoVChMImf_ixcX8yAIVCKAOCh3XIAOw#imgrc=-TxbVBtGbd_V8M%3A (Accessed: 6 November 2015).

Profile theatre lighting hire oxford (no date) Available at: http://www.acdisco.com/profile-light-hire.html (Accessed: 6 November 2015).

Acclaim|Acclaim axial 18°-34° Zoomspot (no date) Available at: http://www.seleconlight.com//index.php?option=com_virtuemart&page=shop.product_details&flypage=flypage.p1&category_id=121&product_id=74 (Accessed: 6 November 2015).

Keller, M. and Szabó, D. (2006) Light fantastic: The art and design of stage lighting, with DVD. 2nd edition. New York: Prestel Publishing.

111 (no date) How to make a cheap home made par can. Available at: http://www.instructables.com/id/How-to-make-a-cheap-home-made-par-can/ (Accessed: 8 November 2015).

Types of lantern (no date) Available at: http://www.theatrecrafts.com/page.php?id=803 (Accessed: 8 November 2015).

Pebble convex (no date) Available at: http://www.pslx.co.uk/prod03.htm (Accessed: 8 November 2015).